pocket of resistance
A small but consolidated group of people standing in opposition to someone or something. Most of the country has fallen to the brutal regime, but there remains several pockets of resistance determined to hold out until the bitter end. There's a pocket of resistance within the company to the proposed merger, but I'll make sure they don't stand in our way.
pocket of resistance
Fig. a small group of people who resist change or domination. The accounting department seems to be a pocket of resistance when it comes to automating.